I agree with you, I think Xabi needs one more year with Bayer Leverkusen to get a more respectable position. However, according to media reports, Bayern Munich are interested in signing him. Bayern Munich will part ways with Thomas Tuchel at the end of the season. They need a technical director and I'm sure they will also want to weaken their opponents as they always do. If they insist on Xabi Alonso they can finish this transfer, there are very few who can say no to them.
In my opinion, Xabi Alonso on the right time acceptable the other team offer for next season after impressive performance with Bayern Leverkusen last two season and success break the record as manager reached most of unbeaten games.
No doubt with Alonso achieved since first season begin until few matches left he was success make Bayern Leverkusen becoming strong team by unbeaten until 38 matches and success dominance on Bundesliga behind 10 points left from Bayern Munich.
Interested if acceptable bid offer to be Liverpool's manager next season, I think not special if becoming Bayern Munich manager next season because he won Bundesliga tittle and need to be EPL team manager how to fell most difficult competition not easily winning every match games.